Elevator.



F. WIDMANN & H. s. WELLS.

ELEVATOR.

APPLICATION FILED FEB.17, 1910.

Patented Mar. 26, 1912.

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F. WIDMANN & H. S. WELLS.

' ELEVATOR.

APPLICATION FILED rmaiv, 1910. 1,021,172. Patented Mar. 26,1912.

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@VM JJ Q NITED STATES PATENT OFFICE.

o'rrs ELEVATOR COMPANY, or

NEW JERSEY.

FREDERICK WIDMANN AND HARRY S. WELLS, OF ST. LOUIS, MISSOURI, ASSIGNORS T0 JERSEY CITY, NEW JERSEY, A CORPORATION OF ELEVATOR.

Specification of Letters Patent.

Patented Mar. 26, 1912.

Application filed February 1'7, 1910. Serial No. 544,458.

To all whom it may concern Be it known that we, FREDERICK W'ID- MANN and HARRY S. VVELLs, citizens of the United Stat-es, residing in St. Louis, State of Missouri, have invented a new and useful Improvement in Elevators, of which the following is a specification. 1

Our invention relates to elevators designed for use in cold-storage ware-houses and other places where it is desirable to prevent a circulation of air through the elevator hatchway doors.

With elevators which communicate with cold-storage rooms it has been customary to provide vestibules at the hatc'hway doors in order to prevent the escape of cold air through the hatchway. These vestibules involve considerable expense for installation as wellas occupying valuc ble space and an object of the present invention is to dispense with the use of these vestibules by providing means carried by the car for forming a substantially air-tight closure around each hatchway door when the elevator is opposite such door.

It has heretofore been proposed to attach some sort of packing. to the elevator platform which would fit closely to the sides of the hatchway but this has been found to be unsatisfactory and impractical especially for elevators operating at a moderate or high speed. The present invention aims to overcome the objections incident to the use of-packings or gaskets having a sliding contact with the walls of the hatchway and to this end provides a sleeve or packing around the elevator door. which sleeve may be projected into operable position when the car is at rest and which may be'withdrawn before the operation of the car.

Other objects of the invention will appear hereinafter, the scope of the invention being defined in the appended claims in which are set forth the novel combinations of elements.

In the accompanying drawings which illustrate an elevator embodying one form of the present invention, Figure 1 is a part sectional elevation view of the elevator and also shows diagrammatically, operating and controlling circuits for the electric motor. Fig. 2 is an elevation view of the car on a larger scale. Figs. 3, 4 and 5 are fragmentary views on an enlarged scale showing details of a sleeve used to form a closure between the car and hatchway.

The elevator car C, except as hereinafter indicated, may be of the usual or any ap proved construction. For the purpose of illustration, a well known form of hoisting apparatus is shown which comprises an electric motor M mounted on a base B on which is also mounted the hoisting drum D and brake mechanism E. The motor shaft 1 is connected through worm gearing As herein shown, a direct current motor M is employed which is adapted to be connected through a mainline switch S with the positive and negative leads designated and respectively, extending to any suitable source of current supply. Reversing switches R and R are adapted to be,

operated by the reversing switch magnets 11, r, the circuits of which are controlled by the manual car switch L. If the car switch lever is movedfor example to the right, so as to electrically connect switch contacts 5 and 6, the circuit is established for the reversing switch magnet 1, which circuit may be traced from the positive main through reversing switch magnet r, c0nductor 7, car switch contacts, conductor 8, switch contacts 9, conductor 10, and to the negative main. The magnet 1 will therefore receive current and operate the reversing switch R to closed position, thereby establishing a circuit which may be traced from the positive main, through a conductor 10, reversing switch contacts 11, 12 and from thence to the motor armature; from the motor armature the circuit extends through the conductor 13, series resistance 14 and conductor 15, switch contacts 16 and 17, and conductor 18 to the negative main. Reversing switch R at the same time lifts the bridging contact 19 into engagement with the stationary contacts 20 and 21 and thereby establishes a circuit through the shunt field winding of the motor. The motor now receives current and operates through the hoisting apparatus to lift or lower the car. An accelerating magnet N may be provided and is connected in paral lel with the motor armature and as themotor accelerates, operates in a well known manner to short-circuit the starting resist ance let in successive steps. If the car switch lever is moved in the opposite direction from a central posit-ion, the reversing switch R is operated and reverses the armature connections so that the motor is operated in the opposite direction.

The mechanism for preventing the escape of cold air through the hatchway when the elevator communicates with cold storage rooms, will now be described. The elevator wall or hatchway P is provided with door openings 0 at the floor landings, which openings are adapted to be closed as usual with hatchway doors. As shown in the drawings, the car is at rest at a floor landing, the hatchway being provided with a door on each side of the elevator. Rectangular frames T, adapted to be projected into engagement with the hatchway, are carried by the car. Each frame T comprises vertical side pieces 25, a horizontal bottom strip 26 and a top strip 27. The ends of these strips are connected by angle irons 28 as shown in Figs. at and These frames T are located outside of and surround the cage as shown. Pivotally connected to the left hand frame T, near its top and bottom respectively, are rods 30, 31 which extend toward the right hand side of the car. Rods 32 and 33 are likewise pivoted to the right hand frame T. The inner ends of the rods 30 and 32 are pivotally connected at 3t and the inner ends of the rods 31, 33 are pivotally connected at A vertical rod 36 is connected to the pivot-s 34 and 35. The lower end of the rod 36 is pivoted at 37 to a rock arm 38 secured to the rock shaft 39 extending horizontally beneath the car. ithin the car is a manually operative lever 40 secured to the rock shaft 39. The lever 40 is adapted to be moved to the position shown in dotted lines, Fig. 2. and through the system of links and levers just described moves the frames T out of and into engagement with the walls of the elevator shaft. The lever 40 is adapted to be held in adjusted position by means of pins 41 and 4:2.

Secured to the outer edges of the frames T are gaskets 44: of rubber or other suitable material so that when the frames T are projected into engagement with the hatchway, a practically air-tight closure is formed between the car and walls surrounding the hatchway doors so that the escape of cold air through the hatchway is prevented while the hatchway doors are open. It will be understood that the side walls of the car as well as the top and bottom are made practically airtight so that the cold air cannot escape through the car into the hatchway. The top of the car is shown by the broken line 30 (Fig. 2). When the lever 40 is moved to the right, the switch con:

tacts 9 are separated, thereby breaking the controlling circuit leading to the car switch L and preventing the operation of the motor while the frames T are in contact with the hatchway. In other words, the frames T must be withdrawn in order to close the switch 9 before either reversing switch can be operated to supply current for lifting the brake and operating the motor.

The rock-shaft 39 is preferably extended to the opposite side of the car and the rock arm 38, rod 36 and links 30 to 33 are duplicated at the opposite side of the car so that the frames T are supported and operated from both sides. Fig. 3 is a detail showing a portion of the frame T and operating link 33 on the side of the car opposite that shown in Fig. 2.

It will be understood that the present invention is not confined to elevators operated by electric motors but may be used with other types of elevators and that the operating lever 40 may also be used to control other forms of power mechanism which may be employed.

It is desired further that the invention be not limited to the particular features of construction herein shown as various changes in the details of construction and arrangement of parts may be made without departing from the spirit and scope of the invention.

lVhat we claim as new and desire to secure by Letters Patent of the United States, 1s

1. The combination with an elevator car and a hatchway therefor provided with an opening, of means movable relatively to the car into position to prevent or obstruct the circulation of air through said opening and hatchway without obstructing said opening.

2. The combination with an elevator car and a hatchway provided with a door open ing in the wall of the hatchway, of means carried by the car and surrounding said opening to impede or prevent the escape of air through said opening to the hatchway when the car is opposite the opening.

The combination with a car and hatchway, of means carried by the car for forming a substantially air-tight joint between the car and hatchway, and mechanism for operating said means.

4. The combination with a car and. hatchway, of means movable relatively to the car into position to form a practically air-tight joint between the car and hatchway.

The combination with an elevator car, of a hatchway provided with an opening, means movable into and out of position to form a closure between the car and hatchway, said closure surrounding said opening when the car is opposite the opening.

6. The combination of an elevator car and a frame carried thereby and movable into position to form a lateral extension surrounding the car door.

7. The combination of an elevator car and a frame surrounding a side of the car and movable into a position to extend laterally beyond the side of the car.

8. The combination with an elevator car, of a hatchway therefor, a sleeve or frame carried by the car and surrounding the car door and resilient material carried by said frame and adapted to form a closure between the car and hatchway wall.

9. The combination with an elevator car and a hatchway, of a device carried by the car and movable into and out of position to form a closure between the car and wall of the hatchway, an operating lever within the car and connections between said lever and said device for operating the latter.

10. The combination with an elevator car, of a sleeve surrounding a wall of the car, an operating lever within the car, and mechanical connections between said lever and sleeve for operating the latter.

11. The combination with an elevator car, of sleeves surrounding opposite walls of the car, an operating device within the car, and operating connections between said device and said sleeves.

12. The combination with an elevator car, of a hatchway therefor provided with oppositely disposed door openings, sleeves surrounding said openings, and a single device for operating said sleeves into and out of position to form closures between the car and said openings when the car is opposite said openings.

18. The combination with an elevator car and a hatchway, of a device movable into and out of position to prevent a circulation of air, hoisting apparatus, and means for preventing the operation of said hoisting apparatus when said device is in operative position.

14. The combination with an elevator car, of a hatchway therefor, apparatus movable into and out of position to prevent or check the circulation of air through the hatchway; hoisting mechanism, controlling mechanism therefor, and means associated with said controlling mechanism for preventing the operation of the hoisting mechanism when said apparatus is in operative position.

15. The combination with an elevator car, of a hatchway provided with a door opening, a device associated with the car for preventing the escape of air through said opening, means for operating said device, electric hoisting mechanism, and means associated with the operating means for controlling the operation of said hoisting mechanism.

16. The combination with an elevator car, of a hatchway, a device carried by the car and movable into and out of position to check the circulation of air through the hatchway, an operating lever within the car, connections between said lever and said device for operating the latter when the lever is operated, an electric motor, hoisting apparatus between the car and motor, controlling mechanism for the motor, a manual switch within the car, a circuit extending from said switch to said controlling mechanism, and a switch in said circuit controlled by said operating lever.

17. The combination of an elevator car and a hatchway provided with a lateral opening in a vertical wall of the hatchway,

and means surrounding said opening and preventing or impeding the escape of air from the opening through the hatchway when the car is opposite said opening.

18. The combination of a car and hatchway each having a door opening, and means surrounding the said openings and forming a joint between the car and a wall of the hatchway.

19. The combination of a car, a hatchway provided with an opening in a vertical wall thereof, and means surrounding the said opening to form substantially an airtight joint between the car and the said opening.

20. The combination of a car, a hatchway, means to form an airtight joint be tween the car and hatchway, and mechanism to adjust said means into and out of operative position.

21. The combination of a car having an opening, a hatchway having an opening, adjustable means to form an airtight joint between the said openings, and mechanism operative to adjust said means.

22. In combination, a car having an opening, a hatchway having an opening, and means movable relatively to the car to form a practically airtight joint between the car and hatchway openings without obstructing said openings.

In testimony whereof, we have signed our names to this specification in the presence of two subscribing witnesses.

FREDERICK WIDMANN. HARRY S. WELLS.

Witnesses:

A. E. KLOBASA, A. ANDERSON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

